本研究以不同分子量(4000及400000 g/mol)之非離子型聚合物PEO以及三種非離子型界面活性劑C9PE10、C9PE20、C18E20配合四種不同陽離子交換容量之蒙脫土進行吸附實驗，藉由吸附實驗探討四種不同陽離子交換容量之蒙脫土對PEO以及三種非離子型界面活性劑之吸附機制，再由黏度實驗瞭解吸附乙烯氧之聚合物及界面活型劑對蒙脫土漿料流變性質之影響。
結果顯示PEO中具疏水性之CH2-CH2-部分與膨潤土基面(basal plane)之疏水作用為PEO吸附到膨潤土表面的主要原動力。POE將優先吸附在低CEC膨潤土的表面;且吸附PEO後的親水性和剝離度增加。
對A(CEC:90)膨潤土而言，PEO的吸附導致漿料黏度降低；而對B(CEC:115)、 C(CEC:59.3)、 D(CEC:60.8)膨潤土而言，PEO的吸附導致漿料黏度升高。
界面活性劑(C9PE10、C9PE20、C18E20) 會優先吸附在低CEC膨潤土的表面。推斷界面活性劑是以EO鏈以平躺方式吸附於膨潤土之表面上，碳氫鏈直立於水中，所以界面活性劑中亦是以CH2-CH2-O（乙烯氧鍵）的疏水作用吸附到膨潤土表面。而界面活性劑(C9PE10、C9PE20、C18E20) 亦會優先吸附在低CEC膨潤土的表面。
除了膨潤土C(CEC:59.3)、D(CEC:60.8)吸附界面活性劑C9PE20，導致漿料黏度上升外；其餘膨潤土吸附界面活性劑後，其漿料黏度皆下降。

This research is based on the nonionic polymer PEO of different molecular weight (4000 and 40000 g/mol) and three types of nonionic surfactant C9PE10、C9PE20、C18E20 adsorbed on four montmorillonites with different cation exchange capacities. Then the rheology behavior of suspensions of montmorillonites after adsorption was studied to understand the effect of ethylene oxide unit adsorption on rheology of montmorillonites.
The result shows that the CH2-CH2-part in the PEO is hydrophobic and the hydrophobic interaction between CH2-CH2- and basal plane of the montmorillonites are the main driving force for adsorbing PEO on the surface of the montmorillonites. POE will adsorb preferentially on the low CEC montmorillonites. In addition, the hydrophilicity and degree of delmination of montmorillonites increase after the adsorption on PEO.
For A (CEC:90) bentonite, the adsorption of PEO will cause a falling of the viscosity of the suspension and for B (CEC:115), C(CEC:59.3), D(CEC:60.8) bentonite, the adsorption of PEO will result in a rising of the viscosity of the suspension.
Surfactants (C9PE10、C9PE20、C18E20) will adsorb preferentially on low CEC bentonites. It is inferred that the surfactant utilizes the EO chain to adsorb and lying flatly on the surface of bentonite but the hydrocarbon chain stands vertically in the water. Therefore for the surfactant, the hydrophobic interaction between CH2-CH2- and basal plane of the montmorillonites are also the main driving force for adsorbing surfactant on the surface of the montmorillonites.
Except that the adsorption of surfactant C9PE20 on bentonite C(CEC:59.3) and D(CEC:60.8) result in a rising of the viscosity of the suspensions, the rest of the bentonite, after adsorbing the surfactant, the viscosity of the suspension fall.

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